256 NORTH AMERICAN FLORA [VoLUME 34 
hemispheric, 3-3.5 mm. high, 4-6 mm. broad; bracts 12-18, in about 3 series, more or less 
villous, at least when young, yellowish- or purplish-brown, scarious-margined, acutish or the 
innermost rounded at the apex, the outer ovate, somewhat shorter than the inner oval ones; 
ray-flowers 12-15; corollas 1.5 mm. long; achenes nearly 1.5 mm. long; disk-flowers 25-40; 
corollas cylindro-campanulate, 2.5 mm. long, usually slightly hairy; style filiform. 
‘Type Locauity: Labrador. 
DIstRrBuTION: Greenland and the arctic coast, southward to Quebec, and in the mountains 
to Colorado and Washington. : po 
ILLUSTRATIONS: Fl. Dan. pl. 1585; Britt. & Brown, Ill. Fl. f. 3999; ed. 2. f. 4572 (as A. borealis). 
17. Artemisia manca Rydberg, sp. nov. 
A low cespitose perennial, almost acaulescent; stems 5—7 cm. high, decumbent at the 
base, with a few reduced leaves, purple, sparingly villous when young, soon glabrate; leaves 
mostly basal, 1-2 cm. long, bipinnatifid, silvery-silky; primary divisions 3-5, the secondary 
ones mostly 3, narrowly linear-oblanceolate; stem-leaves small, mostly ternate or the upper 
simple, linear or with linear divisions; inflorescence spike-like; heads short-peduncled or sub- 
sessile, subtended by small linear leaves, the upper ones crowded; involucre hemispheric, 4-5 
mm. broad, and nearly as high; bracts about 25, purplish, sparingly pubescent, with a prominent 
midrib, the outer oblong, nearly as long as the inner ones, which are broadly oval, rounded 
at the apex; ray-flowers 12-15; corollas 1.5 mm. long; achenes 1.5 mm. long; disk-flowers 
25-30; corollas cylindro-campanulate, 2 mm. long, tipped with brown-purple; style 1.5 mm. 
long. 
20675 collected at Cold Bay, Alaska, July 31, 1904, C. V. Piper 4223 (U. S. Nat. Herb. no. 
18. Artemisia borealis Pall. Reise 3: 755. 1776. 
Artemisia violacea Ledeb. Mém. Acad. St.-Pétersb. 5: 567. 1815. 
Artemisia borealis Wormskjoldii Besser; Hook. Fl. Bor. Am. 1: 327. 1833. 
Artemisia borealis Ledebouri Besser, Bull. Soc. Nat. Mosc. 8: 85. 1835. 
Artemisia borealis Pallasit Besser, Bull. Soc. Nat. Mose. 8: 87. 1835. 
Artemisia camtschatica Schlecht.; Ledeb. Fl. Ross. 2: 568, assynonym. 1846. 
A perennial, with a cespitose rootstock; stems rather loosely silky or in age glabrate, 1-3 
dm. high; basal leaves clustered, 3-7 cm. long, petioled, twice pinnatifid with linear divisions, 
silky-villous; stem-leaves pinnatifid into linear-filiform divisions or those of the inflorescence 
entire; heads in a usually narrow panicle, erect, subsessile or the lower peduncled; involucre 
hemispheric, 3-4 mm. high, 5-6 mm. broad; bracts 12-20, in about 3 series, slightly villous, 
brown with dark purplish-brown centers; ray-flowers 15-25; corollas fully 1.5 mm. long; 
achenes about 1.5 mm. long; disk-flowers 25-40; corollas more funnelform, nearly 3 mm. 
long, the teeth sparingly long hairy; style filiform, fully 2 mm. long. 
TYPE LOCALITY: Siberia. 
DIsTRIBUTION: Eastern Siberia and Alaska to Hudson Bay and Greenland. 
ILLUSTRATIONS: Pall. Reise 3: pl. hh, f. 1; Ledeb. Ic. Fl. Ross. pl. 475. 
19. Artemisia ripicola Rydberg, sp. nov. 
A tufted perennial, with a cespitose woody caudex; stems erect, 1-2 dm. high, silky- 
canescent; basal leaves clustered, 3-5 cm. long, silky-canescent with appressed hairs, pin- 
natifid or bi-pinnatifid into narrowly linear-oblanceolate divisions, petioled; stem-leaves 
pinnatifid into 3-5 narrowly linear divisions or those of the inflorescence entire; heads sub- 
sessile or very short-peduncled, erect, in a simple raceme or a narrow spike-like panicle; in- 
volucre hemispheric, 3-3.5 mm. high, 4-5 mm. broad; bracts about 15, yellowish, lanceolate 
or ovate-lanceolate, acute, scarious-margined, sparingly silky; ray-flowers about 15; corollas 
1.5 mm. long; achenes fully 1.5 mm. long; disk-flowers 10-15; corollas deeply campanulate, 
2 mm. long, the teeth sparingly hairy; style cylindric, 1.5 mm. long. 
a ie collected at Biggs, Sherman County, Oregon, 1910, A. A. Heller 10117 (herb. N. Y. Bot. 
ar 
DISTRIBUTION: Oregon and Washington, along the Columbia River. 
